NHA CPT NHA Certified Phlebotomy Technician - Set 3 - Part 2

Correct Answer: Yellow SPS, blue, gold, lavender

the standard sequence places yellow SPS for cultures first, then light blue for coagulation, then gold for chemistry, and finally lavender for the CBC. The order minimizes additive carryover. Option b is incorrect because starting with lavender places EDTA at the top of the draw, which contaminates every subsequent tube with chelated calcium. The proper sequence places EDTA tubes near the end. Option c is incorrect because starting with light blue places coagulation before cultures and serum tubes, which violates the order. Cultures go first to minimize skin flora contamination of culture broth. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because starting with gold places the gel-and-clot-activator tube before the citrate tube, risking carryover into coagulation. The correct order places citrate before the gel tube. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: Falsely prolonged PT

an underfilled citrate tube has excess anticoagulant relative to plasma, prolonging prothrombin time falsely. The reported value would suggest unnecessary fresh frozen plasma transfusion if the clinician trusted it. Option a is incorrect because hemolysis describes red cell lysis releasing hemoglobin, unrelated to citrate underfill. Hemolysis arises from collection technique, agitation, or transport stress, not citrate-to-plasma ratio. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because falsely shortened prothrombin time is the opposite of what underfill produces. Excess citrate prolongs rather than shortens the assay, which is why labs reject underfilled tubes. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because claiming no effect on prothrombin time ignores the chemistry. The citrate-to-plasma ratio is engineered for nine-to-one, and underfill above ten percent skews reported clotting ti

Correct Answer: Inversions mix additive with blood

inversions mix additive thoroughly with blood to prevent micro-clots and ensure even chelation or anticoagulation. Glass red tubes contain no additive, so there is nothing to mix. Option a is incorrect because inversions do not warm the specimen meaningfully, since gentle motion does not transfer enough kinetic energy. Warming devices exist separately, and the rule rests on additive mixing. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because inversions do not speed centrifugation, since centrifuge time depends on rotor speed and tube geometry. The inversion rule sits at collection rather than the centrifugation step. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because inversions do not activate gel separation directly. Gel separation occurs during centrifugation under gravity-induced phase separation, regardless of inversion at the bedside. The standard reflects current practice in routine

Correct Answer: Hemoconcentration with elevated analytes

prolonged tourniquet time produces hemoconcentration as fluid leaves the vascular space. Cells, large proteins, and protein-bound analytes increase artifactually, including hematocrit, albumin, calcium, and many enzymes. The standard reflects current practice in routine clinical phlebotomy. Option a is incorrect because reduced specimen volume is not the dominant effect of prolonged tourniquet application. Volume depends on tube vacuum and flow, while hemoconcentration changes relative concentration. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because hemolysis can occur during difficult draws but is not the direct effect of tourniquet time itself. Hemoconcentration is the recognized analyte-affecting consequence of prolonged occlusion. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because lowered hematocrit is the opposite of the actual effect, since hemoconcentration raises hematocrit. Flu

Correct Answer: Small needle on high-vacuum tube

the small needle on a high-vacuum tube creates turbulent flow that lyses red cells, releasing intracellular potassium and lactate dehydrogenase. The mismatch between needle bore and tube vacuum causes hemolysis. Option b is incorrect because a hematoma underlying the site is a separate hemolysis cause involving extravascular blood near the vein. The scenario describes turbulent flow from a small-bore needle, not hematoma-related lysis. Option c is incorrect because reflux from an underfilled additive tube causes hemolysis when blood flows backward into the patient. The scenario describes turbulent forward flow from a small needle, not reflux events. Option d is incorrect because excessive shaking during transport hemolyzes specimens through mechanical agitation, not draw turbulence. The scenario describes the collection moment with a small needle on high-vacuum tube. The standard reflects current practice in routine clinical phlebotomy.

Correct Answer: Three to four inches above

the tourniquet is placed three to four inches above the intended puncture site. Closer placement risks contaminating the antiseptic field, while farther placement is less effective at distending antecubital veins. Option a is incorrect because placing the tourniquet directly over the puncture site contaminates the antiseptic field and blocks the entry point. The site has to remain accessible for palpation and prep. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because placing the tourniquet six to eight inches above the site is too far to effectively distend the antecubital veins. The standard window targets three to four inches above the site. Option c is incorrect because placing the tourniquet only one inch above the site contaminates the antiseptic field once it is prepared. The standard requires distance to keep the site clean and clear.

Correct Answer: One minute

the standard limits tourniquet time to one minute before puncture. Beyond one minute, hemoconcentration develops and skews results, so the phlebotomist releases and reapplies after a two-minute rest. Option a is incorrect because a five-minute limit far exceeds the standard and would cause significant hemoconcentration. Multiple analyte values would be artifactually elevated, which is why the standard sets a tighter window. Option c is incorrect because a ten-minute limit is impossibly long and would produce serious specimen distortion. Hemoconcentration starts within minutes, and tissue ischemia could begin during such an interval. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because a thirty-second limit is shorter than typical practice allows for palpation and preparation. The standard accepts up to a minute, balancing practical workflow with analyte stability concern.

Correct Answer: Index finger

the index finger is recommended because it has high tactile sensitivity and no significant pulse. Using the thumb risks confusing the phlebotomist's own pulse with the patient's vessel pulsation. Option b is incorrect because the thumb has a strong pulse of its own, which can be mistaken for the patient's arterial pulsation during palpation. The standard rules out thumb palpation specifically for this reason. Option c is incorrect because the middle finger is acceptable but lacks the established standard recommendation that the index finger holds. Tactile sensitivity is high in both, but the index is the conventional choice. Option d is incorrect because the ring finger has lower tactile sensitivity than the index and is not the standard for palpation. The index finger remains the conventional choice across phlebotomy training programs.

Correct Answer: Seventy percent isopropyl alcohol

seventy percent isopropyl alcohol is the routine antiseptic for venipuncture, applied with a concentric scrub and allowed to air-dry. The concentration optimizes microbial kill while evaporating quickly. Option a is incorrect because povidone-iodine is reserved for blood culture skin preparation and certain neonatal applications. It is not the standard for routine venipuncture, since iodine staining and slower drying make it impractical. Option b is incorrect because chlorhexidine is preferred for blood cultures and central line care because of its longer residual antimicrobial activity. It is not the routine venipuncture antiseptic in most facilities. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because benzalkonium chloride is used specifically for blood alcohol determinations to avoid contaminating the specimen. It is not the routine venipuncture standard for general purposes elsewhere. The standard reflects current practice in routine

Correct Answer: Neonates and chlorhexidine-allergic

neonates and patients with chlorhexidine allergy receive povidone-iodine for blood culture preparation. Chlorhexidine has skin absorption concerns in neonates and obvious allergy concerns when documented. The standard reflects current practice in routine clinical phlebotomy. Option a is incorrect because pregnant women do not have a specific contraindication to chlorhexidine for blood culture skin prep. The standard adult prep applies, and switching to iodine is not driven by pregnancy. Option b is incorrect because diabetic patients can use standard chlorhexidine for blood culture skin prep without contraindication. Diabetes does not change the antiseptic choice unless the patient has documented chlorhexidine allergy. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because patients on warfarin do not have a contraindication to chlorhexidine for blood culture skin prep. The anticoagulant affects bleeding management rather than the choice of

Correct Answer: Median cubital vein

the median cubital vein is the first choice because it sits centrally, anchors well, and tends to be the largest. Its location away from brachial artery and median nerve makes it safest. Option b is incorrect because the cephalic vein is the second choice on the lateral side. It is acceptable when the median cubital is not viable, but its tendency to roll makes it less ideal. Option c is incorrect because the basilic vein is the third and last choice because it lies adjacent to brachial artery and median nerve. Its position makes accidental arterial puncture or nerve injury more likely. Option d is incorrect because the brachial artery is not a venous draw target and would be punctured intentionally only for arterial blood gas. Targeting the artery during venipuncture would cause arterial bleeding.

Correct Answer: Thumb below, pulling skin taut

the safe anchoring technique places the thumb one to two inches below the puncture site and pulls skin taut downward toward the wrist. The pull stabilizes the vein without finger crossing the path. Option a is incorrect because the C-grip places the thumb above the vein, putting the operator's finger directly in line with the needle path. An accidental movement could send the needle into the operator's thumb. Option b is incorrect because pinching the vein from both sides distorts the vessel and obstructs insertion. The standard technique uses one hand below the site to pull skin taut, keeping the vein straight. Option d is incorrect because squeezing the arm above the elbow does not anchor the vein and may compromise circulation. Anchoring is a local action at the puncture site, separate from the tourniquet.

Correct Answer: Fifteen to thirty degrees

the CLSI standard sets the insertion angle at fifteen to thirty degrees for routine venipuncture. The shallow angle balances easy access with low risk of transfixing the posterior wall. Option a is incorrect because forty-five to sixty degrees is too steep and risks transfixion of the vessel. The standard sits much shallower, at fifteen to thirty degrees, to keep the bevel safely within the lumen. Option b is incorrect because sixty to ninety degrees is far too steep and matches techniques used for intramuscular injections rather than venipuncture. The standard for venous draws is shallow. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because five to ten degrees is too shallow and risks the bevel skimming the surface without entering the vein. The standard window of fifteen to thirty degrees provides reliable entry.

Correct Answer: Bevel up

the bevel-up orientation reduces tissue trauma by presenting the sharpest part of the needle first. The orientation also makes a smaller wound in the vessel wall and improves first-stick success. Option a is incorrect because bevel-down orientation presents the blunt edge of the needle first, increasing tissue trauma and reducing success. The standard rules out bevel-down because it does not match design intent. Option c is incorrect because bevel-to-the-side orientation does not match standard practice of bevel-up insertion. Lateral orientation does not optimize trauma reduction or vessel entry, so the standard places the bevel up. Option d is incorrect because rotating the bevel during insertion is not the standard technique and creates unnecessary tissue motion. The needle is inserted with the bevel up and held steady through entry.

Correct Answer: Release tourniquet before withdrawal

release the tourniquet before needle withdrawal, ideally as the last tube fills, then place gauze over the site as the needle exits. The sequence drops venous pressure before withdrawal. Option b is incorrect because withdrawing the needle first, then releasing the tourniquet, leaves elevated venous pressure during withdrawal. The pressure pushes blood out into surrounding tissue, increasing hematoma risk. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because applying pressure only during needle removal does not address elevated venous pressure. The standard releases the tourniquet first to drop pressure, then applies gauze pressure as the needle exits. Option d is incorrect because leaving the tourniquet on until bandaging keeps venous pressure high throughout withdrawal and bandaging. The hematoma risk persists during that entire window, which is what the standard prevents.

Correct Answer: Needlestick Safety and Prevention Act

the Needlestick Safety and Prevention Act of two thousand amended the OSHA Bloodborne Pathogens Standard. It mandates engineering controls including safer needle devices and the single-use tube holder rule. Option a is incorrect because the HIPAA Privacy Rule covers patient health information privacy and security rather than sharps engineering controls. The law is unrelated to needlestick prevention requirements. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because ANSI Z358.1 is the consensus standard for emergency eyewash and shower equipment. It addresses workplace exposure response rather than sharps engineering controls. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because the Civil Rights Act Title Six covers nondiscrimination in federally funded programs and supports interpreter access. It is unrelated to sharps engineering controls or needlestick prevention. The standard reflects cur

Correct Answer: Probing or fishing under the skin

probing or fishing under the skin is specifically prohibited during failed-flow scenarios. The motion can puncture nerves or arteries and tear the vein, with no gain over withdrawing. Option a is incorrect because adjusting needle depth slightly within the same insertion track may be acceptable when the bevel sits at the wrong level. Small repositioning differs from probing, which involves wider movement. Option c is incorrect because applying gentle distal pressure with a finger can sometimes encourage flow into the bevel. The technique does not violate the prohibition against probing, since it works above the skin. Option d is incorrect because withdrawing and trying the other arm is part of the standard response to failed flow. The two-attempt rule allows the same operator to make at most two tries before transfer.

Correct Answer: Have a colleague attempt

the two-attempt rule limits the same operator to at most two tries before transferring the draw to another phlebotomist. The transition gives the patient a fresh perspective and reduces cumulative trauma. Option a is incorrect because a third attempt by the same operator violates the facility two-attempt rule. The transfer to another phlebotomist exists specifically to break the cycle of unsuccessful tries. The standard reflects current practice in routine clinical phlebotomy. Option b is incorrect because insisting the patient return tomorrow ignores the option of having a colleague try right now. Some draws are time-sensitive, so deferring delays clinical care unnecessarily. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because continuing to probe the same site after two failed attempts violates both the probing prohibition and the two-attempt rule. Probing risks nerve injury and arterial puncture. The standard reflects current practice

Correct Answer: Stop, withdraw needle, firm pressure

the immediate response is to stop the draw, withdraw the needle safely, and apply firm direct pressure for several minutes. Cold packs can follow during the first day, with warm compresses afterward. Option b is incorrect because continuing the draw while a hematoma is actively forming worsens the leak and patient discomfort. The standard requires immediate stopping, since further blood entry expands the hematoma. The standard reflects current practice in routine clinical phlebotomy. Option c is incorrect because applying heat immediately to a fresh hematoma worsens swelling because vasodilation increases bleeding. The standard sequence uses cold first to constrict vessels, then warm compresses later. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because massaging the area disperses blood through tissue and worsens the hematoma. The standard applies firm direct pressure rather than massage, which would increase bruising and discomfort. The

Correct Answer: Withdraw needle and document

the recommended response is to withdraw the needle immediately, document the event, and notify the clinician. Continued contact with the nerve risks permanent neuropathy, so prompt withdrawal limits lasting harm. Option a is incorrect because continuing carefully ignores the nerve contact signal and risks permanent injury. Sharp electric pain shooting down the limb is the warning sign that demands immediate withdrawal rather than completion. Option b is incorrect because repositioning the needle deeper drives further into the nerve and worsens the injury. The standard withdrawal response prevents lasting damage rather than deepening the contact. The standard reflects current practice in routine clinical phlebotomy. Option d is incorrect because massage afterward does not address the active nerve contact and would not be the immediate action. The first response is needle withdrawal and documentation, with massage having no role.